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2U1B L2 Reviewing Linear FunctionsEquations of LinesThe vertical line through the point (a, b)has equation x = a since every x-coordinate on the line has the same value a.𝟐,𝟓−𝟏,𝟑𝟎,𝟑𝟐,𝟑𝟒,𝟑𝟐,𝟑Similarly, the horizontal line through (a, b) has equation y = b𝟐,𝟎The horizontal line through the point (2, 3) has equation𝟐,−𝟐y = 3The vertical line through the point (2, 3) has equationx = 2

3Finding Equations of Vertical and Horizontal LinesU1B L2 Reviewing Linear FunctionsFinding Equations of Vertical and Horizontal LinesEXAMPLE 1Write the equations of the vertical and horizontal linesthrough the point −𝟑, 𝟖Horizontal Line is y = 8−𝟑, 𝟖Vertical Line is x = – 3

6General Linear EquationU1B L2 Reviewing Linear FunctionsGeneral Linear EquationAlthough the general linear form helps in the quick identification of lines, the slope-intercept form is the one to enter into a calculator for graphing.Ax + By = CBy = – Ax + Cy = – (A/B) x + C/B